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| Mirrors > Home > MPE Home > Th. List > vtxduhgrfiun | Structured version Visualization version GIF version | ||
| Description: The degree of a vertex in the union of two hypergraphs of finite size on the same vertex set is the sum of the degrees of the vertex in each hypergraph. (Contributed by Mario Carneiro, 12-Mar-2015.) (Revised by Alexander van der Vekens, 21-Jan-2018.) (Revised by AV, 7-Dec-2020.) (Proof shortened by AV, 19-Feb-2021.) |
| Ref | Expression |
|---|---|
| vtxduhgrun.i | ⊢ 𝐼 = (iEdg‘𝐺) |
| vtxduhgrun.j | ⊢ 𝐽 = (iEdg‘𝐻) |
| vtxduhgrun.vg | ⊢ 𝑉 = (Vtx‘𝐺) |
| vtxduhgrun.vh | ⊢ (𝜑 → (Vtx‘𝐻) = 𝑉) |
| vtxduhgrun.vu | ⊢ (𝜑 → (Vtx‘𝑈) = 𝑉) |
| vtxduhgrun.d | ⊢ (𝜑 → (dom 𝐼 ∩ dom 𝐽) = ∅) |
| vtxduhgrun.g | ⊢ (𝜑 → 𝐺 ∈ UHGraph) |
| vtxduhgrun.h | ⊢ (𝜑 → 𝐻 ∈ UHGraph) |
| vtxduhgrun.n | ⊢ (𝜑 → 𝑁 ∈ 𝑉) |
| vtxduhgrun.u | ⊢ (𝜑 → (iEdg‘𝑈) = (𝐼 ∪ 𝐽)) |
| vtxduhgrfiun.a | ⊢ (𝜑 → dom 𝐼 ∈ Fin) |
| vtxduhgrfiun.b | ⊢ (𝜑 → dom 𝐽 ∈ Fin) |
| Ref | Expression |
|---|---|
| vtxduhgrfiun | ⊢ (𝜑 → ((VtxDeg‘𝑈)‘𝑁) = (((VtxDeg‘𝐺)‘𝑁) + ((VtxDeg‘𝐻)‘𝑁))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vtxduhgrun.i | . 2 ⊢ 𝐼 = (iEdg‘𝐺) | |
| 2 | vtxduhgrun.j | . 2 ⊢ 𝐽 = (iEdg‘𝐻) | |
| 3 | vtxduhgrun.vg | . 2 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 4 | vtxduhgrun.vh | . 2 ⊢ (𝜑 → (Vtx‘𝐻) = 𝑉) | |
| 5 | vtxduhgrun.vu | . 2 ⊢ (𝜑 → (Vtx‘𝑈) = 𝑉) | |
| 6 | vtxduhgrun.d | . 2 ⊢ (𝜑 → (dom 𝐼 ∩ dom 𝐽) = ∅) | |
| 7 | vtxduhgrun.g | . . 3 ⊢ (𝜑 → 𝐺 ∈ UHGraph) | |
| 8 | 1 | uhgrfun 28999 | . . 3 ⊢ (𝐺 ∈ UHGraph → Fun 𝐼) |
| 9 | 7, 8 | syl 17 | . 2 ⊢ (𝜑 → Fun 𝐼) |
| 10 | vtxduhgrun.h | . . 3 ⊢ (𝜑 → 𝐻 ∈ UHGraph) | |
| 11 | 2 | uhgrfun 28999 | . . 3 ⊢ (𝐻 ∈ UHGraph → Fun 𝐽) |
| 12 | 10, 11 | syl 17 | . 2 ⊢ (𝜑 → Fun 𝐽) |
| 13 | vtxduhgrun.n | . 2 ⊢ (𝜑 → 𝑁 ∈ 𝑉) | |
| 14 | vtxduhgrun.u | . 2 ⊢ (𝜑 → (iEdg‘𝑈) = (𝐼 ∪ 𝐽)) | |
| 15 | vtxduhgrfiun.a | . 2 ⊢ (𝜑 → dom 𝐼 ∈ Fin) | |
| 16 | vtxduhgrfiun.b | . 2 ⊢ (𝜑 → dom 𝐽 ∈ Fin) | |
| 17 | 1, 2, 3, 4, 5, 6, 9, 12, 13, 14, 15, 16 | vtxdfiun 29416 | 1 ⊢ (𝜑 → ((VtxDeg‘𝑈)‘𝑁) = (((VtxDeg‘𝐺)‘𝑁) + ((VtxDeg‘𝐻)‘𝑁))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 ∪ cun 3914 ∩ cin 3915 ∅c0 4298 dom cdm 5640 Fun wfun 6507 ‘cfv 6513 (class class class)co 7389 Fincfn 8920 + caddc 11077 Vtxcvtx 28929 iEdgciedg 28930 UHGraphcuhgr 28989 VtxDegcvtxdg 29399 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-rep 5236 ax-sep 5253 ax-nul 5263 ax-pow 5322 ax-pr 5389 ax-un 7713 ax-cnex 11130 ax-resscn 11131 ax-1cn 11132 ax-icn 11133 ax-addcl 11134 ax-addrcl 11135 ax-mulcl 11136 ax-mulrcl 11137 ax-mulcom 11138 ax-addass 11139 ax-mulass 11140 ax-distr 11141 ax-i2m1 11142 ax-1ne0 11143 ax-1rid 11144 ax-rnegex 11145 ax-rrecex 11146 ax-cnre 11147 ax-pre-lttri 11148 ax-pre-lttrn 11149 ax-pre-ltadd 11150 ax-pre-mulgt0 11151 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3756 df-csb 3865 df-dif 3919 df-un 3921 df-in 3923 df-ss 3933 df-pss 3936 df-nul 4299 df-if 4491 df-pw 4567 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-int 4913 df-iun 4959 df-br 5110 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5535 df-eprel 5540 df-po 5548 df-so 5549 df-fr 5593 df-we 5595 df-xp 5646 df-rel 5647 df-cnv 5648 df-co 5649 df-dm 5650 df-rn 5651 df-res 5652 df-ima 5653 df-pred 6276 df-ord 6337 df-on 6338 df-lim 6339 df-suc 6340 df-iota 6466 df-fun 6515 df-fn 6516 df-f 6517 df-f1 6518 df-fo 6519 df-f1o 6520 df-fv 6521 df-riota 7346 df-ov 7392 df-oprab 7393 df-mpo 7394 df-om 7845 df-1st 7970 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8380 df-1o 8436 df-oadd 8440 df-er 8673 df-en 8921 df-dom 8922 df-sdom 8923 df-fin 8924 df-dju 9860 df-card 9898 df-pnf 11216 df-mnf 11217 df-xr 11218 df-ltxr 11219 df-le 11220 df-sub 11413 df-neg 11414 df-nn 12188 df-n0 12449 df-xnn0 12522 df-z 12536 df-uz 12800 df-xadd 13079 df-hash 14302 df-uhgr 28991 df-vtxdg 29400 |
| This theorem is referenced by: (None) |
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